US 12,263,008 B2
Apparatus, system and method for diagnosing sleep
Bart Van Pee, Leuven (BE); Frederik Massie, Leuven (BE); and Duarte Mingot De Almeida Mendes De Almeida, Lisbon (PT)
Assigned to Ectosense NV, (BE)
Filed by Ectosense NV, Rotselaar (BE)
Filed on Jul. 10, 2019, as Appl. No. 16/507,405.
Claims priority of application No. 18182957 (EP), filed on Jul. 11, 2018.
Prior Publication US 2020/0015737 A1, Jan. 16, 2020
Int. Cl. A61B 5/00 (2006.01); A61B 5/02 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/4818 (2013.01) [A61B 5/0002 (2013.01); A61B 5/02007 (2013.01); A61B 5/02427 (2013.01); A61B 5/6832 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system configured to diagnose sleep comprising an apparatus configured to be attached to a patient, the apparatus comprising:
an optical sensor configured to measure a blood volume pulse of the patient;
a wireless communication interface configured to wirelessly transmit data representing the measured blood volume pulse; and
wherein the system further comprises one or more processors configured to:
obtain the wirelessly transmitted data representing the measured blood volume pulse;
derive, by processing the data representing the measured blood volume pulse, a signal that represents peripheral arterial tone, wherein the derivation comprises:
determining an upper envelope of the measured blood volume pulse and a lower envelope of the measured blood volume pulse, wherein the upper envelope is a smoothed curve connecting peaks of the measured blood volume pulse and the lower envelope is a smoothed curve connecting troughs of the measured blood volume pulse, and
calculating the signal that represents peripheral arterial tone based on a difference between the upper envelope and the lower envelope; and
determine occurrences of sleep events from changes in the derived peripheral arterial tone signal,
diagnose the sleep of the patient based on the determined occurrences of sleep events.